Method and apparatus for forming concrete piles.



' WITNESSES P..HENDERSON & T. L; ESSICK. METHOD AND APPARATUS FOR FORMING CONCRETE FILES.

APPLIGATIOH FILED. SIPT. 21, 1-912.

:7 /0 INVENTORJ I fflaww J7 1 155 116 0W, W, v 181M Patented Dec. "17, 1912,

- EIELAKK HENBEBSUN AND THOMAS L. ESSIGK, O13 SUI'JIMIT, SQUIRTH IDAEGTE.

METH=R D AND AEPAMT'US FOP FUBMINQ: C(I'NCHETE P31135231.

orn sec.

Toa ll whom it may concern:

Be it known that'we, FRANK HENDERSON and THOMAS L. ESSICK, citizens of the United States, residing at Summit, in the county of Roberts and State of South Dakota, have invented certain new and useful Improvements in Methods and Apparatus for Forming Concrete Piles, of which the following is a specification. I

The present invention relates to an im proved method and apparatus for forming concrete piles, the object oi? the invention being the provision of novel means whereby the opening or hole can be readily formed in the earth and the concrete filling material firmly taniped in position therein.

A further objeotjo'f the invention is to provide a novel method of forming the concrete piles involving the formation of a hole or opening by the successive dropping of a pointed Weight, thereby providing the hole with laterally compacted sides, the con crete being subsequently placed in the opening and firmly temped therein. I

The invention further contemplates a compact, portable, and inexpensive appa-= ratus by means of which theopenings can be quicl'ly formed and the concrete firmly tamped in position therein.

With these and other objects in View, the invention consists in certain novel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claims.

For e. full understanding of the invention,

reference is to he. lied to the following description and accompanying drawing, in whicl1:-

- Figure is a side elevation of on apparatus for forming concrete piles in accordance With the presentinvention, the saideppara fi Qosted in all the views of the dravvi'hlg by the nce characters.

one

" ying out the present invention,

Specification of Letters Patent.

Application filed September 21, 1912. Serial No.

i atent'ed Bee. 1* i932.

pointed Weight or boring element is successively raised to a suitable elevation and then dropped in the same place so as to form an opening in the ground, the operation being repeated until an opening or hole of the required depth has been formed. The dropping of the pointed eight serves to con1- pact the earth so that/an opening is formed with firm and tightly compacted sides. The next etc sists in hlling' the opening with con 'ete and camping the concrete in position Within the same. For convenience in performing these various steps, the boring element is prefer ably formed in duplicate sections, of: which canloe removed to transform the de vice into a temper.

Referring to the drawings, the numeral 1 designates a frame or derrick which may he of any suitable material and construction, although in the-present instence the frame is shown as in the form. of a tripod and supported by a base Q WhlCl'L' mounted upon the Wheels 3. [lhese iiheels are adapted to travel upon a lightportehle track elso thht the frame cah'be readily moved from place to place "as may be desired. A pulley or sheave 5 is joornaled upon the upper part of the frame 1, and a cable 6 passes'a'round this sheave. Qne end of this cable is adapted to be connected to some suitable mechanism, such as a hoisting engine, for taking in and letting out the cable, as is required during the boring/and tamping process.

When forming" the opening or hole in the ground, a pointed Weight is attached to free end of the cable 6, the ss id'weight o'ei'ng raised s within the liniio ccrtltin h its of the derrick, or ,a round necessary by the character of the soil encountered, and

then permitted to drop freely with the cable still attached thereto: Thisnveight it ti'iltes against the ground \vill lijpen etrste the same and forms. clear cntpavit'y, the earth and soil in the vicinit ofthe, open cavity lasing compressed. his operation of raising and dropping the pointed Weight member is repeated until the desired depth of cavity is-reached- This pointed Weight which is used in forming the openingcornprises two duplicate and interchangeable substantially conical members *2 and 8 which have the bases thereof-fitted against each other, the said members being rigidly con.

nected hr suitable fastenin s such as the,

screws 9. The apeg ei each ofthe conical in carrying: out the process con members '2' and 8 is termed with an opening 16, the said opening 10in the upper member 7 engaging a ring 11, and the said ring 11 being connected by a dead eye 12 to the cable 6. it will also be observed that these members 7 and 8 are partly hollow and filled with some heavy filling material such as lead 13. This lead may be poured into the interior of these members 7 and 8 through openings le in the ends thereof, the said openings being subsequently closed by the plugs 15.

After a cavity of the desired depth has been formed in the ground, the lower conical member 8 is removed from the upper conical member 7 so that the said member 7 presents a fiat lower face and can be used as a tamper. Concrete is now poured into the cavity, indicated at 1.6, the successive batches of concrete being tampe-d firmly in position by means of the tamper 7. As indicated by Fig. 2, as the concrete is tamped and compat-ted in position, it. may further compress and expand the sides of the cavity so that the concrete pile will firmly engage the same and be anchored securelyin position. in this operation, the tamper is raised to a sulhcicnt height above the top of the cavity to give the ncces clearance for pouring the desired mixture oi? concrete into the cavity, the tamper being then lowered into the cavity to a point. near the top of concrete previously placed, and then worked energetically and sutliciently to thoroughly incorporate the concrete with the adjacent sides of the cavity. The concrete is thus filled into the cavity in layers and each layer energetically tamped intoposition, the op eration being repeated until the desired length of pile is formed.

ll o reinforcement whatsoever is necessary for the stability of the pile and is not designedv to be employed, although the method of forming the pile admits of the incorporation of reinforcing elements for the connection 01 the upper end of the pile with any connecting reinforcement from pile to pile, or to beams, arches, walls and the like. The use of these reinforcing elements is optional, and they may either be used or omitted as may be found necessary or desirable.

it will thus be obvious that we have provided a simple and inexpensive device for forming concrete piles, the said device being very eli'ective in operation advantage of always keeping the center line of gravity of the pile in as normal a position as is possible.

Having thusdescribed the invention, what we claim as new and desire to secure by Letters Patent, is

1. The method of forming concrete piles. which consists in successively dropping a and having the oaneez boring element to form a cavity with compressed sides, filling the cavity thus formed with successive layers of concrete, and tamping the layers of concrete within the cavity they are placed therein.

2. An apparatus for forming concrete piles, including a boring weight adapted to be successively dropped from an elevation to form the cavity, said boring weightbeing formed in detachable sections, one of ivhich is removable to transform it into a tamper.

3. An apparatus for forming concrete piles, including a tamper, means for raising and dropping the tamper, and a boring attachment adapted to be applied to the tamper for forming the cavit st. An apparatus for forming concrete piles, including a pair of duplicate conical members having the bases thereof fitted together, and means for raising and dropping the said members, the two members when used in conjunction with each other serving to form the cavity in the earth, while one of the members when used independently of the other member forms. a tamper.

5. An apparatus for forming concrete piles, including a pair of hollow and similar conical members, a heavy filling within the iembers to impart weight thereto, means for detachably fasteningthe bases of the conical members together with the apexcs thereof extending in opposite directions, means for engaging the apex of one of the conical members forraising and dropping the same, the two conical members when secured together serving to form the cavity in the earth, while one conical member serves as a tamper.

6. An apparatus. for forming concrete piles, including a derrick, a guide member upon the derrick, a cable passing around the guide member, means for taking in and letting out the cable, a pairof substantially conical weights, means for detachably securing the bases of the conical weights together with the apxes thereof facing in opposite directions, and means for connecting the apex of one of the weights to the cable whereby the weights will be raised and dropped as the cable is taken in and let out, the two weights when secured together storming a borer for producing a cavity in the earth, while one of the weights forms a tamper for tamping the concrete within the cavity.

In testimony whereof we aiiix our signatures in presence of two witnesses.

ELMER HERRIED, ANTON J YnsTRUK.

or this patent may be obtained for' five cents each, h 7 Washington, D. (I.

y addressing the Commissioner of Patents, U 

